To clean a crystal chandelier, you will need:

1. A ladder or step stool
2. Soft cloths or towels
3. A mild detergent or vinegar
4. Water
5. A toothbrush or small scrub brush (optional)

Here are the steps to follow:

1. Turn off the electricity to the chandelier and let it cool down if it has been on.
2. Dust the chandelier gently with a soft cloth or feather duster.
3. Make a cleaning solution by mixing a mild detergent or vinegar with water.
4. Dip a cloth into the solution and wring it out well.
5. Wipe down each crystal carefully, being sure to rinse the cloth frequently in the cleaning solution.
6. Use a toothbrush or small scrub brush to gently scrub any dirt or grime from the nooks and crannies of the chandelier.
7. Rinse each crystal with a clean, damp cloth.
8. Dry the chandelier thoroughly with a clean, dry cloth.
9. Turn the electricity back on and enjoy your sparkling clean chandelier!

It’s important to handle the crystals gently and to use a mild cleaning solution, as harsh chemicals or abrasive scrubbing can damage the delicate crystals. If your chandelier is particularly dirty or has not been cleaned in a long time, you may need to repeat these steps.